extensions/libxt_tcp.c in iptables through 1.4.21 does not match TCP SYN+FIN packets in…
Priority LOW 38Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · Partial · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.
Summary
extensions/libxt_tcp.c in iptables through 1.4.21 does not match TCP SYN+FIN packets in --syn rules, which might allow remote attackers to bypass intended firewall restrictions via crafted packets. NOTE: the CVE-2012-6638 fix makes this issue less relevant.
Why it matters now
EPSS 0.02737 86th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 5 | Affected | No fix yet |
| Red Hat Enterprise Linux 6 | Affected | No fix yet |
Timeline
- 2026-10-02 Threatist record created from CVE-2012-2663
- 2026-10-03 Alias added: GHSA-g725-p8m6-82j4
References
More Netfilter Iptables vulnerabilities
- TI-2001-01340 iptables before 1.2.4 does not accurately convert rate limits that are specified on the… CVSS 2.0MEDIUM 5.0
- TI-2019-08482 A buffer overflow in iptables-restore in netfilter iptables 1.8.2 allows an attacker to… CVSS 3.1MEDIUM 4.2
- TI-2001-01339 iptables-save in iptables before 1.2.4 records the "--reject-with icmp-host-prohibited"… CVSS 2.0LOW 2.1
Sources
- CVE-2012-2663 · CVE Program
- CVE-2012-2663 · NVD
- FIRST EPSS
- GHSA-g725-p8m6-82j4 · GitHub Advisory Database · CC BY 4.0
- CVE-2012-2663 · Red Hat security data · CC BY 4.0
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